Fluid-pressure riveting-machine.



PATBNTBD JUNE 12, 1906.

B. B. HANNA.

FLUID PRESS 6. o -m Pu| Nn ma. Gn .A

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UNITED STATES 'PATENT OFFICE..

ELMER ELSWORTH HANNA, OF CHICAGO, ILLliOlb.

FLUlD-PRES'SUHE YFNVET!MGHNUIGIHNE...

Application llle Hay 15, NGS.

Beecication of Letters Iatent.

Patented June r12, 1908.

Renewal April et, 190e. solo No. 313,680.

To all when@ it may concern:

Be it known that I, ELMER ELswon'rH HANNA, a citizen of the United States, residing at Chicago, in the county of Cook and State of. Illinois, have invented certain new and useful Improvements in Fluid-Pressure Riveting-lviachines, of which the following is a seciiication he principal object of this 'invention is te rovide a luidpressure riveting-machine Wit a system ofeoinpoind levers for transmitting power and motion from the prime mover to the riveting-dies, quickly atfirst,

with 'gradually-reduced s eed and'infn-'easingY pressure, and during the nal riveting operation Vat a continued substantially uniform speed end pressure, as will more fully herein after appear.

The invention eornprehends principally "a fluid-pressure riveter in which there are conibined a plunger bearin a riveting or similar tool, a main operatingever, link mechanism pivotally connecting the main operating-lever and plunger together, and other links connecting main operating-levers with frame, a fluid-pressure cylinder, a reciprocating piston therein provided with a pro}ecting pistonrod, and an intermediate lever pivotally secured on the frame of the machine and pivotally connecting the piston-rod and main operatirgever together.

'le the invention is designed Primarily for what is termed "fluidressure riveters, manifestly the same can )e employed with other types of rivers.

The invention consists, further and finally, in the features, combinations, and detalls of construction hereinafter described and claimed.

' in the accompanying a side elevation showin anism and section of a iuid-pressure riveter as it apears when constructed in accordance wit these im rovements; Fig. 2, a p en view of the saine ooking at it from shove;

`iiig, 3, an enlarged front elevation of the op# per erin and supporting nieehanisi'n el the r1veter as it appears in Fig. 1; Fig. 4, a side elevation of the saine, partl in section, teiten on line 4 of Fig. 3 loo ing in the direction of the arrow; and Fig. 5, a diagram of the amount of motion transmitted by the system of levers tothe pion v or mechanism.

In the art to wliic i this invention relates,it is well known that it has long been desired to provide a fluid-pressure rlveter with positive drawings, Figure i isV the cylinder meeh-V mechanical elements, such as a system of levers interposed between the prime mover and the riveting-tool in such a'nianner as to `olif tain a substantially ra id movementY with graduali -reduced epee and inereesin pressure et st and then a continued se stantially uniform transmission of power and motion at the end or during the time the iinsl Work is being performed. YTo this end this invention is principall designed.Y

In constructing a accordance with these improvements I make e.. main bifurcated frame portion a snostantially C-shaped in conteur when looked at. in

Vside elevation, as shown in Fig. 1. Siidably mounted in the' upper arm b of this bifurcated frame is a plunger c, bearing a rivetin or other o eratin tool d, the shank of Whic is sereiv-tiireade therein, so that it ma be adjusted or removed for purposes of rep acement hy a similar or other tool, as occasion requires. To operate this plunger with its rivetin tool, a main operating-lever e is rovided, ulcrumed within the machine an at right angles with the line of motion of said plunger, A pair of links f is provided and pivotally secured Within the frame of the rnechine at g, in which by means of trunnions h the main operating-lever is fulcrumed. EX- amining srticularly Fig. 4, it will be seen that the s ort portion ofthe main operating lever extends forward of the fulcrunnng-trun- ,nions and the main portion to the rear, also that the front portion is hollowed out to re.

ceive the link 'e'.,ithat is pivotally secured therein and also pivotally secured to the plunger, so that power and motion may be transmitted from said main operating-lever, vastly "muitiplied, to the plunger mechanism. To operate said main operatingdever, e {inidpressure cylinder j is provided and pivotally secured at lf 'to a rearward extension I on the Vportable frame of the machine. This oylinr der is provided with a reciprocating piston m, and a piston-rod n proiects unwardly and outwardly therefrom. ver p is provided, fulerulned in an extension of the machine at q, which pivotally connects the main operating-lever and the piston-rod to other. `;i

lBy the oregoinvf varrangen'uint of levers it wiii he seen thet the lolfesired transmission of ower andV motion issecured. As shown in iig. 5, the iirst inch of movement of the main piston obtains substantially twice the lenlgth of movement olh the plunger, due to the not uid -pressnre riveter in An intermediate le-A that the members of the toggle mechanism f and L are 1n their position of greatest an le to the line of movement of plunger C. e

second inch of movement produces about :in

, inehof plunger motion, end each succeeding movement of plunger becomes less in proportion to piston movement until toggle membersf and Ai-reach posit-ions where their center lines are approximately parallel with line of motion of plunger (Y, where movement due to 'toggling action practically stops, while the last six inc les' of motion of said main piston obtains aeontinued Substantially uniform movement, greatly. reduced for every inch thereof, due solel to the action of main lever c, oscillating on iulcrum h. `as shown in the graduat ions within the main lilies, (indicated by 6 in saidiigure,) all of which will be understood and appreciated by those skilled in the art. In the togglelever type of riveters heretofore employed when parts having varying or unequal thickness were to be riveted together orwhen its rivets were of varying length the rivet set in each instancerequired ad justmcnt, so that the required pressure could be secured at the proper interval or during the active riveting interval. It is thc necessity of this setting or repeated adjustment of thc rivet set that this invention is.4 designed to avoid.v By the arrangement of levers above descri bed the substantially maximum or necessary active riveting or working pressure is continuous for a considerable distance, so that were the parts being riveted warped or of unequal thickness at one point. the pressure would be sullirient to completo the riveting at that point, while were the plates or parts reduced in thickness the continuous maximum pressure would, as in .travel ol thc rivet set `anvil t and `the the other case, complete the riveting, and so without adjustment. Briefly, t he distance olj i during the active or maximum pressure interval is suliicient to compensate for incfpialitios in the material being riveted and renders the machine useful without subsequent. adjustment l'or riveting different thicknesses of material, Again, by the gradual increasing em )loved oi 1ltilie.dv to primarily n j tifl t?! of the rivet, While the continui nitx mum pressurtl linally closes-tile bends onto the plates, foicili theplatcstogcthenyiii completes the tina union ci the mrtls.

In the art of riveting it is well lmownthat it 1s usual tobave thc main suppin'ting-frame of the machine remainl relatively?statinmiry and thatV the phingcrhasthe' actual reciprollpeadcd J 'portioncating n ultimuo'that'thc ts usiially-plac of the rivet,

downV upon thc This is `quite oh] ctlonalile linsonne kindsot work,`in that onlyone rlvet canjbc set in pose tion at 'a time, and 'considerable are has to be exercised tu prmv'ent it fro-m falling out.

pressure and dccreasV Y. ing speed the relative lower pressure can. 1c

-Hltiilbn of a l' l' tlterivet, upset..`

In my improved arrangement any number of rivets may be set in position., as esired, with the headed portion up and the unfinished portion projecting down through the work. It is necessary, however, in order tooperate upon rivets thus arran ed without inverting the. rivetin -machine, t at the machine or su portingrame should have movement while the plunger remains stationary. In other words, the upper portion remains stationary, while the lower, usually the anvil, moves and performs the heading operation. To facilitate these operations, the plunger is provided with projecti pins or studs a, passed vthrough elongate openings win the frame of the machine. Secured to these projecting pins or studs on each side ofthe machine is a pair of bars or links s, which are also pivotally se'- cured to the frame of the machineiby means of links r and the intermediate lever p. A air ol chains a: may be used for hanging said bars, and Vthereby the riveter, in position.

lIn operation when the plungeris reciprocating, relatively speaking, and contacting th rivet during the heading process the main portion of the machine -with its anvil is forced upwardly, and when the reciprocating plunger is, relatively speaking, moved upward the main supporting-frame of the machine is permitted to drop to its normal position, thus enabling the o erator to insert any number of rivets in a Vance of the actual rivetinir process, all of which will be understood an( appreciated by those skilled in the art. vl clairn-` l., ln a liuidspressure riveter, the combination of a frame, a plunger bearing a riveting or similar tool, a main operating-lever,

a swinging tnlcrun'i for such lever, link' mechanism connecting the Amain operatinglever and plunger together. a fluid-pressure cylinder, a reciprocating piston therein provided with a piston-rod projecting therefrom, and an intermediate lever pivotally IOO mounted upon and secured to the frameyL/dw the machine and pivotally eonneeti with the piston-roi`l and iifiatingflever, su'lstantially as described. i ,.Lhln a llnid-prehittltevriveter, the ennui!- g suporting-frame; a Wings' reilprocatingly mounted therein an( Hanging an riveting or siivnilar tool, a iitaihdpniit it iwcr, linkfmechanism pix/upa ly mounted .in the` l'ram'e of thd-inachine and in which the main opt ratilig-lcvcr is fulcrumed, link mechanism connecting thc plunger and main moratingdcvcr together, a Hohl-pressure cylinder, a reciprocating piston mounted therciuand provided with a piston-rod projecting therefrom, and intm'ntcdiatc lever mechanism Ifulernnu-,d in machine and pivotall ipcratingdcvcr and piston-rod together, substantially as described. f

in a fiuidfpressure riveter, the combi n tlioframe of they y connecting the mam- Ils ig- A isn 4tinlly us dosori movably Imounted in `such ylindcn moons for admitting Huid Vunder )rossore to the cylinder-chamber7 llever mechanism connecting such pistonnnd plunger ndapted ,to trunsnlit an increasingpressure'to the plunger and n relatively rapid grndully-decrensing speed throughout u ,portion of its stroln` und .n nxnximuin substantially 'uniform 'irssurc und Speed throughoutn suhstnntin subs@-` uont .portion ofuohstroke, oubstnntinlly ns r ascribed.

1,2. 1u .n machine of' the class dosoribed, the c'olnbinntion ol n l'rnlne, Un .pistolroylinder, 'n piston movnbly u'lountod insuch plstonrylindor, inennq'for ndinitting lluidimd'er prossuro to suoli `pistpn-oylinder, ,n longer mounted in suoli frame, and connoutor v1 euh- :unsin hetwoon the plunger and piston w Lereby tlnplu'ngoris inovednt n gradually-decreasing spoed lwith rulationnto t'ho *mover inout of the pistonduringthe first portion of its 'strokel und :it #slower form spu'ud undinrsubstntially uniform relntion lo thoniovcmcut of the piston'during n subsoquent )ortion of ,its .Strolre, substituinfd. V

13.` [u n ninohino of the class described', thu combination of n frame,l n piston-cylinder mountod thoreon, u -in suoli pintoii-QflindolgA moans for admitting lluid under pressuro to' auch piston-cylinder, n plungcr nlountvd in such frame inovable at n gradunlly-d'eorensing speed. and increns? lng )rosanna with rlntion to the movement ol'- tim piston during tho irst'port'ionof'its stroko und nt n oubtnntially uniform s eed und pressure n nd in substantially uni orm relation to thogniovoinent of the piston durngvtzho inst portion of itsstrollrdnnd loyer mechanism connecting such plunger and piston'flor operating the plunger insnch relation tothe. in toinubstuntiull nodescribd.'

14. n n. innchino ol t e class described,

'tively rn 'idV v stroke, substantially ni; desoribd. substantially unir9- Vvided with a rivetingftool, lnoans forlhoiingf pistou inovnblyl mounted l 5o portion ,of itsstroke nndnt :t substnntinllv luniform spend und in substnntinlly unjforril l rolntion to the nioyeinent `of the pistondur`- ingr the lust' Aportion ofifl stro le, alriwjtingtool' inountd in ,snel-i plungr, nn Innvil mounted in the frame opposite.suolirivetin f tool, and lovr inochamnrn coijiigted 'iiii such plunger'nnd opifrnted by such psfqhior trnnsmitting an increasing prssureqlnd rlw doreasingspd to thelplpn er 6o during t ie-lrst `portion of .its stroke on' ia substnntinll uniffqr'rn lnasrimnlm`- pssnre and speed t oughont thelust portipnpf-its 15.111141 nwlchino' of the lassposlcrihed, tho combination of ai rnowiahl, frtnle hiiqin up -er andj'lower lrmslfor rqeiving mato/rib. to @operated-umn ther-obotwenfa plun'gr mounted--in-snchzmovnble frarne 4 and s'uolr plunger in' substnntivallyflxed,

. i. .Q'Siflii n `lower riveting-tool'.inounted yin t -nrni movable therewith andpvit'hrelnltipnlto the plunger and the material tobo opprgted uponf and means for 4movliiig'; 4the framepd suoli lower riveting-tool upWnrd-and dgjnvn` ward with relationA to the plunger grndunllyincreasing pressure thrpu 'liront .the first portion ofits stroke and Vim, er x'naxi' nnim and substantially uniform st untinlly as described.

yssfl 

